I usually leave my Acer computer with Windows 8.1 on, so as not to require rebood time, and I leave my Firefox browser on, usually with something like
8 or 15 tabs open.

Sometimes, the browser pages go white (blank), and an attempt to reload the page usually does not do any good.

If I reboot the computer and reopen it, they come back.

I'm sure this compact little computer has integrated video. (I liked the big tower computers that would let me add or replace stuff, but I usually
get used computers, and the big spacious towers don't seem to prevail these days.) If some of what it is supposed to display does not show, does
that mean there is a problem with the graphics circuitry? Should I get into the box and see if it is dusty, and either blow it out or brush-dust it
off? Would overheating cause this?

It puzzles me that shortcut pictures and the screen wallpaper still show up, and the browser "frame" (tool bar, address bar, tab headings) still
display--but not the part one gets from the internet.

Sometimes, a part of a web page will display, but it goes to blank when I try to scroll down more than what was already in the display.